/*-
 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
 * Copyright (c) 2023-2024 Haiku, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <posix/fenv.h>

/* Default floating-point environment - round to nearest, all exceptions disabled */
const fenv_t __fe_dfl_env = 0x00000000;

#if __BSD_VISIBLE

/* Enable selected exceptions */
int feenableexcept(int mask)
{
    fenv_t oldmask, newmask;

    __rfs(oldmask);
    newmask = oldmask | (mask & FE_ALL_EXCEPT);
    __wfs(newmask);

    return (oldmask & FE_ALL_EXCEPT);
}

/* Disable selected exceptions */
int fedisableexcept(int mask)
{
    fenv_t oldmask, newmask;

    __rfs(oldmask);
    newmask = oldmask & ~(mask & FE_ALL_EXCEPT);
    __wfs(newmask);

    return (oldmask & FE_ALL_EXCEPT);
}

/* Return enabled exceptions */
int fegetexcept(void)
{
    fenv_t mask;

    __rfs(mask);

    return (mask & FE_ALL_EXCEPT);
}

#endif /* __BSD_VISIBLE */